Kosei Oshita is a professional footballer from JPN and is currently 17 years old. At international level, he features for Japan U17. His main role on the pitch is Goalkeeper. He measures 185cm in height and weighs 78kg.

His latest transfer saw him join Kashima Antlers U18 from Kashima Antlers Jugend via on 2025-04-01.

In the Shenyang Peace Cup 2025, Kosei Oshita played 3 matches, averaging 0 interceptions, 0 tackles, and 0 clearances per game.